Question

what happens when n-butyl bromide is Treated Aqueous KOH and why ?

Answer 1

but SN2 proceeds in non-polar solvents o.O

Answer 2

SN2 proceeds in Polar aprotic solvents where as water is a polar protic solvent

Answer 3

The SN1 is favoured by stabilizing the bromide ion

Answer 4

but how can the carbocation is stablized in SN1 it is a primary alkyl halide ?

Answer 5

it's likely that there is a hydride shift from one of the carbons beside it, making it a secondary carbocation.